<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>多行侧轴对齐方式</title>
    <style>
       .box{
           display: flex;
           /* 换行 */
           flex-wrap: wrap;
           /* 主轴对齐方式 */
           justify-content: space-between;
           /* align-items: flex-end; 单行控制*/
           /* 多行测轴对齐 */
           /* 上对齐 */
           /* align-content: flex-start; */
           /* 中对齐 */
           /* align-content: center; */
           /* 底对齐 */
           /* align-content: flex-end; */
           align-content: space-between;
           width: 1000px;
           height: 500px;
           border: 3px solid black;
           margin: 100px auto;
       }
       .box div{
           width: 300px;
           height: 200px;
           background-color: pink;
       }

    </style>
</head>
<body>
    <div class="box">
        <div>1</div>
        <div>2</div>
        <div>3</div>
        <div>4</div>
        <div>5</div>
        <div>6</div>
    </div>
</body>
</html>